2128571 has 6 divisors (see below), whose sum is σ = 2205372. Its totient is φ = 2054360.

The previous prime is 2128561. The next prime is 2128591. The reversal of 2128571 is 1758212.

It is a de Polignac number, because none of the positive numbers 2^k-2128571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2128571.

It is not an unprimeable number, because it can be changed into a prime (2128501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 425 + ... + 2106.

It is an arithmetic number, because the mean of its divisors is an integer number (367562).

2^2128571 is an apocalyptic number.

2128571 is a deficient number, since it is larger than the sum of its proper divisors (76801).

2128571 is an equidigital number, since it uses as much as digits as its factorization.

2128571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589 (or 2560 counting only the distinct ones).

The product of its digits is 1120, while the sum is 26.

The square root of 2128571 is about 1458.9623024602. The cubic root of 2128571 is about 128.6360552817.

The spelling of 2128571 in words is "two million, one hundred twenty-eight thousand, five hundred seventy-one".